A logarithmic function is the inverse of an exponential function. We can write functions exponentially as b^x=a, and then logarithmically as log base b of a = x. I familiarized Alexa with how to go back and forth between the two forms. She took notes from the board, and we went through several examples. We also started to calculate logarithms. She understood the concepts and thinks that what we are doing so far is easy.